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1 /*
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2 * Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 # include "incls/_precompiled.incl"
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26 # include "incls/_constMethodKlass.cpp.incl"
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27
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28
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29 klassOop constMethodKlass::create_klass(TRAPS) {
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30 constMethodKlass o;
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31 KlassHandle h_this_klass(THREAD, Universe::klassKlassObj());
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32 KlassHandle k = base_create_klass(h_this_klass, header_size(),
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33 o.vtbl_value(), CHECK_NULL);
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34 // Make sure size calculation is right
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35 assert(k()->size() == align_object_size(header_size()),
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36 "wrong size for object");
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37 //java_lang_Class::create_mirror(k, CHECK_NULL); // Allocate mirror
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38 return k();
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39 }
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40
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41
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42 int constMethodKlass::oop_size(oop obj) const {
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43 assert(obj->is_constMethod(), "must be constMethod oop");
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44 return constMethodOop(obj)->object_size();
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45 }
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46
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47 bool constMethodKlass::oop_is_parsable(oop obj) const {
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48 assert(obj->is_constMethod(), "must be constMethod oop");
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49 return constMethodOop(obj)->object_is_parsable();
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50 }
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51
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52 constMethodOop constMethodKlass::allocate(int byte_code_size,
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53 int compressed_line_number_size,
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54 int localvariable_table_length,
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55 int checked_exceptions_length,
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56 TRAPS) {
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57
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58 int size = constMethodOopDesc::object_size(byte_code_size,
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59 compressed_line_number_size,
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60 localvariable_table_length,
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61 checked_exceptions_length);
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62 KlassHandle h_k(THREAD, as_klassOop());
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63 constMethodOop cm = (constMethodOop)
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64 CollectedHeap::permanent_obj_allocate(h_k, size, CHECK_NULL);
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65 assert(!cm->is_parsable(), "Not yet safely parsable");
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66 No_Safepoint_Verifier no_safepoint;
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67 cm->set_interpreter_kind(Interpreter::invalid);
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68 cm->init_fingerprint();
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69 cm->set_method(NULL);
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70 cm->set_stackmap_data(NULL);
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71 cm->set_exception_table(NULL);
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72 cm->set_code_size(byte_code_size);
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73 cm->set_constMethod_size(size);
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74 cm->set_inlined_tables_length(checked_exceptions_length,
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75 compressed_line_number_size,
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76 localvariable_table_length);
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77 assert(cm->size() == size, "wrong size for object");
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78 cm->set_partially_loaded();
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79 assert(cm->is_parsable(), "Is safely parsable by gc");
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80 return cm;
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81 }
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82
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83 void constMethodKlass::oop_follow_contents(oop obj) {
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84 assert (obj->is_constMethod(), "object must be constMethod");
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85 constMethodOop cm = constMethodOop(obj);
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86 MarkSweep::mark_and_push(cm->adr_method());
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87 MarkSweep::mark_and_push(cm->adr_stackmap_data());
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88 MarkSweep::mark_and_push(cm->adr_exception_table());
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89 // Performance tweak: We skip iterating over the klass pointer since we
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90 // know that Universe::constMethodKlassObj never moves.
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91 }
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92
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93 #ifndef SERIALGC
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94 void constMethodKlass::oop_follow_contents(ParCompactionManager* cm,
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95 oop obj) {
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96 assert (obj->is_constMethod(), "object must be constMethod");
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97 constMethodOop cm_oop = constMethodOop(obj);
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98 PSParallelCompact::mark_and_push(cm, cm_oop->adr_method());
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99 PSParallelCompact::mark_and_push(cm, cm_oop->adr_stackmap_data());
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100 PSParallelCompact::mark_and_push(cm, cm_oop->adr_exception_table());
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101 // Performance tweak: We skip iterating over the klass pointer since we
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102 // know that Universe::constMethodKlassObj never moves.
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103 }
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104 #endif // SERIALGC
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105
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106 int constMethodKlass::oop_oop_iterate(oop obj, OopClosure* blk) {
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107 assert (obj->is_constMethod(), "object must be constMethod");
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108 constMethodOop cm = constMethodOop(obj);
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109 blk->do_oop(cm->adr_method());
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110 blk->do_oop(cm->adr_stackmap_data());
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111 blk->do_oop(cm->adr_exception_table());
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112 // Get size before changing pointers.
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113 // Don't call size() or oop_size() since that is a virtual call.
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114 int size = cm->object_size();
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115 return size;
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116 }
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117
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118
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119 int constMethodKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
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120 assert (obj->is_constMethod(), "object must be constMethod");
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121 constMethodOop cm = constMethodOop(obj);
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122 oop* adr;
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123 adr = cm->adr_method();
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124 if (mr.contains(adr)) blk->do_oop(adr);
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125 adr = cm->adr_stackmap_data();
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126 if (mr.contains(adr)) blk->do_oop(adr);
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127 adr = cm->adr_exception_table();
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128 if (mr.contains(adr)) blk->do_oop(adr);
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129 // Get size before changing pointers.
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130 // Don't call size() or oop_size() since that is a virtual call.
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131 int size = cm->object_size();
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132 // Performance tweak: We skip iterating over the klass pointer since we
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133 // know that Universe::constMethodKlassObj never moves.
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134 return size;
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135 }
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136
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137
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138 int constMethodKlass::oop_adjust_pointers(oop obj) {
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139 assert(obj->is_constMethod(), "should be constMethod");
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140 constMethodOop cm = constMethodOop(obj);
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141 MarkSweep::adjust_pointer(cm->adr_method());
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142 MarkSweep::adjust_pointer(cm->adr_stackmap_data());
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143 MarkSweep::adjust_pointer(cm->adr_exception_table());
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144 // Get size before changing pointers.
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145 // Don't call size() or oop_size() since that is a virtual call.
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146 int size = cm->object_size();
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147 // Performance tweak: We skip iterating over the klass pointer since we
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148 // know that Universe::constMethodKlassObj never moves.
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149 return size;
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150 }
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151
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152 #ifndef SERIALGC
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153 void constMethodKlass::oop_copy_contents(PSPromotionManager* pm, oop obj) {
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154 assert(obj->is_constMethod(), "should be constMethod");
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155 }
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156
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157 void constMethodKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
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158 assert(obj->is_constMethod(), "should be constMethod");
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159 }
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160
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161 int constMethodKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
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162 assert(obj->is_constMethod(), "should be constMethod");
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163 constMethodOop cm_oop = constMethodOop(obj);
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164 #if 0
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165 PSParallelCompact::adjust_pointer(cm_oop->adr_method());
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166 PSParallelCompact::adjust_pointer(cm_oop->adr_exception_table());
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167 PSParallelCompact::adjust_pointer(cm_oop->adr_stackmap_data());
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168 #endif
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169 oop* const beg_oop = cm_oop->oop_block_beg();
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170 oop* const end_oop = cm_oop->oop_block_end();
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171 for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) {
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172 PSParallelCompact::adjust_pointer(cur_oop);
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173 }
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174 return cm_oop->object_size();
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175 }
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176
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177 int constMethodKlass::oop_update_pointers(ParCompactionManager* cm, oop obj,
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178 HeapWord* beg_addr,
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179 HeapWord* end_addr) {
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180 assert(obj->is_constMethod(), "should be constMethod");
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181 constMethodOop cm_oop = constMethodOop(obj);
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182
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183 oop* const beg_oop = MAX2((oop*)beg_addr, cm_oop->oop_block_beg());
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184 oop* const end_oop = MIN2((oop*)end_addr, cm_oop->oop_block_end());
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185 for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) {
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186 PSParallelCompact::adjust_pointer(cur_oop);
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187 }
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188
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189 return cm_oop->object_size();
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190 }
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191 #endif // SERIALGC
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192
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193 #ifndef PRODUCT
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194
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195 // Printing
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196
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197 void constMethodKlass::oop_print_on(oop obj, outputStream* st) {
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198 ResourceMark rm;
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199 assert(obj->is_constMethod(), "must be constMethod");
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200 Klass::oop_print_on(obj, st);
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201 constMethodOop m = constMethodOop(obj);
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202 st->print(" - method: " INTPTR_FORMAT " ", (address)m->method());
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203 m->method()->print_value_on(st); st->cr();
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204 st->print(" - exceptions: " INTPTR_FORMAT "\n", (address)m->exception_table());
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205 if (m->has_stackmap_table()) {
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206 st->print(" - stackmap data: ");
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207 m->stackmap_data()->print_value_on(st);
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208 st->cr();
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209 }
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210 }
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211
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212
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213 // Short version of printing constMethodOop - just print the name of the
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214 // method it belongs to.
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215 void constMethodKlass::oop_print_value_on(oop obj, outputStream* st) {
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216 assert(obj->is_constMethod(), "must be constMethod");
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217 constMethodOop m = constMethodOop(obj);
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218 st->print(" const part of method " );
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219 m->method()->print_value_on(st);
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220 }
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221
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222 #endif // PRODUCT
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223
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224 const char* constMethodKlass::internal_name() const {
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225 return "{constMethod}";
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226 }
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227
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228
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229 // Verification
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230
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231 void constMethodKlass::oop_verify_on(oop obj, outputStream* st) {
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232 Klass::oop_verify_on(obj, st);
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233 guarantee(obj->is_constMethod(), "object must be constMethod");
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234 constMethodOop m = constMethodOop(obj);
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235 guarantee(m->is_perm(), "should be in permspace");
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236
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237 // Verification can occur during oop construction before the method or
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238 // other fields have been initialized.
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239 if (!obj->partially_loaded()) {
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240 guarantee(m->method()->is_perm(), "should be in permspace");
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241 guarantee(m->method()->is_method(), "should be method");
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242 typeArrayOop stackmap_data = m->stackmap_data();
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243 guarantee(stackmap_data == NULL ||
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244 stackmap_data->is_perm(), "should be in permspace");
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245 guarantee(m->exception_table()->is_perm(), "should be in permspace");
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246 guarantee(m->exception_table()->is_typeArray(), "should be type array");
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247
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248 address m_end = (address)((oop*) m + m->size());
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249 address compressed_table_start = m->code_end();
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250 guarantee(compressed_table_start <= m_end, "invalid method layout");
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251 address compressed_table_end = compressed_table_start;
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252 // Verify line number table
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253 if (m->has_linenumber_table()) {
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254 CompressedLineNumberReadStream stream(m->compressed_linenumber_table());
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255 while (stream.read_pair()) {
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256 guarantee(stream.bci() >= 0 && stream.bci() <= m->code_size(), "invalid bci in line number table");
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257 }
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258 compressed_table_end += stream.position();
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259 }
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260 guarantee(compressed_table_end <= m_end, "invalid method layout");
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261 // Verify checked exceptions and local variable tables
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262 if (m->has_checked_exceptions()) {
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263 u2* addr = m->checked_exceptions_length_addr();
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264 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout");
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265 }
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266 if (m->has_localvariable_table()) {
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267 u2* addr = m->localvariable_table_length_addr();
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268 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout");
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269 }
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270 // Check compressed_table_end relative to uncompressed_table_start
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271 u2* uncompressed_table_start;
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272 if (m->has_localvariable_table()) {
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273 uncompressed_table_start = (u2*) m->localvariable_table_start();
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274 } else {
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275 if (m->has_checked_exceptions()) {
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276 uncompressed_table_start = (u2*) m->checked_exceptions_start();
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277 } else {
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278 uncompressed_table_start = (u2*) m_end;
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279 }
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280 }
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281 int gap = (intptr_t) uncompressed_table_start - (intptr_t) compressed_table_end;
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282 int max_gap = align_object_size(1)*BytesPerWord;
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283 guarantee(gap >= 0 && gap < max_gap, "invalid method layout");
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284 }
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285 }
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286
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287 bool constMethodKlass::oop_partially_loaded(oop obj) const {
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288 assert(obj->is_constMethod(), "object must be klass");
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289 constMethodOop m = constMethodOop(obj);
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290 // check whether exception_table points to self (flag for partially loaded)
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291 return m->exception_table() == (typeArrayOop)obj;
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292 }
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293
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294
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295 // The exception_table is the last field set when loading an object.
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296 void constMethodKlass::oop_set_partially_loaded(oop obj) {
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297 assert(obj->is_constMethod(), "object must be klass");
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298 constMethodOop m = constMethodOop(obj);
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299 // Temporarily set exception_table to point to self
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300 m->set_exception_table((typeArrayOop)obj);
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301 }
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